I thought it was Baker and Clapton that hated each other. I am surprised that Ginger Baker outlived Jack Bruce. Baker has been a top 10 dead pool pick for decades.
Bruce went from John Mayall to Manfred Mann to Cream.
In fact, looking at the John Mayall albums, John McVie was the main credited bassist on all albums from that period, before bailing the group with Mick Fleetwood and Peter Green, to form some group that went about as far to nowhereville as Cream did.
I only see him credited on some bonus cuts, on re-releases. Maybe something happened with McVie, temporarily.